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Finding the Fourth Proportional to 918.88, 1,267.85 and 525.83

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Solution

The fourth proportional to 918.88, 1,267.85 and 525.83 is: 725.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.88 : 1,267.85 = 525.83 : x
  2. Step 2: Convert to fraction form
    918.88/1,267.85 = 525.83/x
  3. Step 3: Cross multiply
    918.88x = 1,267.85 × 525.83
  4. Step 4: Simplify right side
    918.88x = 666,668.54
  5. Step 5: Solve for x
    x = 666,668.54/918.88
  6. Step 6: Final answer
    x = 725.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.